alt Hacker NewsPresumably the issue is that "went swimming in the Amazon" suddenly puts a ton of rare, difficult to identify diseases on the table.
Leptospirosis is known to be both prevalent in tropical areas and to be difficult to positively culture and identify.
Doctors here in Europe are not really into diagnostic medicine. I'm going to compare with Dr. House from the TV series who with a team spent days on a single patient. This is not the reality, the reality is that your specialist doctor will spend 10 minutes thinking about your case before moving on to the next patient.